What are the limitations of using strtotime for dates prior to Jan 1, 1970 on different operating systems?

When using strtotime for dates prior to Jan 1, 1970 on different operating systems, the limitation arises from the fact that strtotime relies on the Unix timestamp, which starts counting from Jan 1, 1970. To solve this issue, you can use the DateTime class in PHP, which provides better support for dates outside the Unix timestamp range. 

$dateString = '1950-01-01';
$date = new DateTime($dateString);
echo $date->format('Y-m-d');

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strtotime dates limitations operating systems Jan 1 1970

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